3Dシーン - Siv3D/Reference-JP GitHub Wiki

# include <Siv3D.hpp>

void Main()
{
    std::array<Light, Graphics3D::MaxLight> lights;

    for (auto& light : lights)
    {
        const Vec3 pos{ Random(-40., 40.), 2.0, Random(-40., 40.) };

        light = Light::Point(pos, 6, HSV(Random(360)).toColorF());
    }

    const Texture texture(L"Example/Particle.png", TextureDesc::For3D);

    GUI gui(GUIStyle::Default);
    gui.add(GUIText::Create(L"ライトの数", 100));
    gui.add(L"Slider.Lights", GUISlider::Create(0, 1.0*Graphics3D::MaxLight, 10, 200));
    gui.addln(L"Text.Lights", GUIText::Create(L"10", 40));
    gui.add(GUIText::Create(L"ライトの品質", 100));
    gui.add(L"Quality", GUISlider::Create(1, 100, 100, 200));
    gui.addln(L"Quality", GUIText::Create(L"100", 40));
    gui.add(GUIText::Create(L"アンチエイリアシング"));
    gui.add(L"FXAA", GUIToggleSwitch::Create(L"Off", L"On", true));

    Graphics3D::SetBlendStateForward(BlendState::Additive);
    Graphics3D::SetDepthStateForward(DepthState::TestOnly);

    while (System::Update())
    {
        Graphics3D::FreeCamera();

        if (Input::MouseR.clicked)
        {
            gui.show(!gui.style.visible);
        }

        if (gui.slider(L"Quality").hasChanged)
        {
            const int quality = gui.slider(L"Quality").valueInt;
            gui.text(L"Quality").text = Format(quality);
            Graphics3D::SetLightBufferQuality(quality);
        }

        if (gui.toggleSwitch(L"FXAA").hasChanged)
        {
            Graphics3D::SetAntiAliasing(gui.toggleSwitch(L"FXAA").isRight ? AntiAliasing::Low : AntiAliasing::None);
        }

        const int lightNum = gui.slider(L"Slider.Lights").valueInt;

        gui.text(L"Text.Lights").text = Format(lightNum);

        Array<Particle> particles;

        for (auto i : step(static_cast<int>(Graphics3D::MaxLight)))
        {
            if (i < lightNum)
            {
                Graphics3D::SetLight(i, lights[i]);

                particles.emplace_back(lights[i].position, 0.5, lights[i].diffuse);
            }
            else
            {
                Graphics3D::SetLight(i, Light::None());
            }
        }

        Plane(100).draw();

        for (auto x : step(10))
        {
            Box({ (x - 4) * 7, (x + 1)*0.5, 30 }, { 2, (x + 1), 2 }).draw();
        }

        for (auto x : step(5))
        {
            Cone({ (x - 2) * 15, 0, 15 }, x + 1, x + 1).draw();
        }

        for (auto x : step(5))
        {
            Sphere({ (x - 2) * 15, x + 1, -5 }, x + 1).draw();
        }

        for (auto x : step(10))
        {
            Cylinder({ (x - 4) * 7, (x + 1)*0.5, -20 }, 1.0, x + 1).draw();
        }

        Graphics3D::DrawParticlesForward(particles, texture);
    }
}